Swanley
Swanley landings, bungalows and kitchens
How the town's terraces, bungalows and extended family houses take a rooflight, and how to keep the room warm once it is in.
01The town
Swanley: a Kent town built for families, now wanting daylight
Swanley sits in Kent right on the edge of Greater London, and most of its houses date from the decades when it grew fast. That shapes every rooflight job here.
The town is in the Sevenoaks District, next to the London Borough of Bromley, with the M25 and the start of the M20 on its doorstep. It began as a railway junction and a place of nurseries and glasshouses, then took on a great deal of housing in the middle of the twentieth century. Walk round and you see the result: rows of 1950s and 1960s houses, short terraces, maisonette blocks, bungalows with low roofs and a good number of homes that have since been extended sideways or backwards.
Those houses were built to a budget and a layout. Landings are narrow, hallways run through the middle and bathrooms sit on inside walls. Daylight reaches the front and back rooms and stops. That is the gap a skylight fills, and rooflight installation in Swanley is mostly about getting the light into the middle of the house without letting the heat out through the top.
| Swanley home | Dark spot | Glass that suits it |
|---|---|---|
| Mid-century terrace or semi | Stairs and landing | Roof window or sun tunnel over the stairwell |
| Low-pitched bungalow | Inner hall and bathroom | Small roof window or tunnel through the loft |
| Extended family home | Middle of the new kitchen | Flat rooflight or lantern on an insulated kerb |
| Maisonette or flat | Top-floor rooms | Check ownership and consent first |
02Planning
Sevenoaks District Council and your Swanley address
The planning authority for Swanley is Sevenoaks District Council, which also covers Hextable and the villages round about.
For a typical house on a Swanley estate, a new roof window is a question of permitted development, and the general position is set out in our skylight planning permission guide. We keep the rules in one place so they never drift out of step on a town page.
What we can say about Swanley itself is simpler. Flats and maisonettes need a different route from houses, so if you own the top floor of a block, check with the council and with your freeholder before you spend a penny. If a house sits in a conservation area, or has a restriction attached to it, the council can tell you from the address. We have not assumed either for any Swanley road, and neither should you.
When the answer is not clear, ask. Our quote form lets you tell us the address, and we point you to what to ask before a survey is booked. Planning officers deal with these questions every day, and a short call now is far cheaper than finding out after the glass is in. If you have a letter from a previous extension or loft conversion, keep it to hand, because it often shows what was agreed for the roof.
03Estates
The inside hall: bringing light into a mid-century house
A landing with no window is the commonest gloomy corner in a Swanley family house, and it is the easiest one to brighten.
In a two-storey house the stairs usually climb through the middle, with the roof directly above. A roof window over the stairwell lights the landing and spills down into the hall. Where the loft is deep or the roof is a tight hip, a sun tunnel does the same job through a small opening, with a polished tube carrying daylight down to a fitted diffuser in the ceiling.
Bungalows have it harder, because the inner hall and bathroom sit well away from any outside wall. A tunnel can run through the loft space to reach them, and a fixed pane suits a bathroom where privacy matters more than a view.
Think about what the light has to do. A landing needs enough daylight to find the stairs safely in the morning, and a hall needs enough to stop the front door feeling like a cave. Neither needs a huge window, and a modest one costs less heat. Either way the loft insulation matters as much as the glass. We keep the quilt tight round the opening and close the ceiling reveal, so you do not trade a dark landing for a cold one.
A window set above the stairwell
A larger opening that gives daylight and, if you choose an opening unit, fresh air up the stairs. Best where the roof pitch is steady and the rafters are clear.
Sun tunnel to a hall or bathroom
A small opening and a long tube, suited to a bungalow or a room under a deep loft. Less heat to manage, because the glass area is small.
04Extensions
Rear extensions: a bright room with a cold roof
Swanley's houses have been stretched out the back for decades, and a flat-roofed kitchen-diner can look bright and still feel chilly.
The older extensions in the town were built when roof insulation was thin. Single-storey, flat-roofed and wide, they have a window wall to the garden and a ceiling that has never been warm. The fix is not simply more glass. It is a rooflight on a properly insulated kerb, a raised frame fixed to the roof deck, with the insulation running right up to the glass seal.
Where there is height in the room, a roof lantern lifts the ceiling and floods the dining end. Where the ceiling is low or the span is narrow, a flat roof rooflight is tidier and loses less. Whichever you choose, the lining inside is closed with insulated boards, so the plaster edge is never the cold bridge.
A lantern on an extension follows that extension's own permission, so if you are adding the room and the roof at once, ask the council about the whole project.
- Insulation continues up the kerb to meet the glass seal.
- Roof deck and upstand are checked before we order the unit.
- Glass is sized to the table or worktop, not the whole ceiling.
- Reveal boards are insulated and closed to the ceiling.
- Floors and furniture are covered before work starts.
05Replacing
Replacing an old window in a house built in the sixties
Some Swanley houses already have a roof window or a plastic dome, and an old one is the cheapest route to a warmer room.
A dome or a single-glazed roof window from a past loft conversion is a thin barrier. It lets out heat, it drips on cold mornings and the frame may have shifted in the opening. Taking it out and fitting a modern unit gives you the chance to put in a new insulation collar and a better lining at the same time. Our guide to replacing an old rooflight explains how we judge whether to swap the whole unit or only the glass.
If the window is a VELUX window or a similar make, a like-for-like swap is straightforward. If you want to go larger, we check the rafters first, because a wider opening means cutting one.
Swanley's landings and inner halls were laid out in the 1950s and 1960s with no daylight of their own, so the roof is the one place left to borrow it from.
06Heat
Keeping a Swanley room warm after the glass goes in
Warm and bright are not rivals. The numbers below are standard figures, not claims about one product.
Rooflight glass carries a U-value, a rating of the heat that gets through every square metre of the pane. The lower the number, the better it holds heat. Our energy-efficient rooflights page walks through the glazing, the spacer between the panes and the frame. Our aim is a room you do not feel the glass in.
- 2.2W/m²K, the most Part L lets a new rooflight lose in a house that already stands
- 1.4W/m²K, a typical figure for good double glazing
- 1.0W/m²K, within reach of triple glazing
- 10 yearsguarantee covering the workmanship of our fitting
Where the glass faces south over a kitchen, a coated pane and a good blind keep the afternoon sun in check. That matters in a bungalow with a low ceiling, where the heat has nowhere to rise to.
07The job
How a fitting works from our Basildon base to Swanley
Swanley is 23 road miles from Basildon, across the Dartford Crossing and round the M25, so we plan the day before we arrive.
Access is easy to plan in most Swanley roads, with driveways on the estates and side access to the back of many houses, which helps when a lantern or a long window has to be carried through. The route is short on a good run and slow when the crossing is busy, so we book the survey for a time that suits both of us and bring the right fixings, collars and blinds in one trip. One team looks at the roof, writes the quote and fits the glass. Floors and furniture are covered and the room is left tidy.
Replacing a whole rooflight, or cutting a new opening, is notifiable work, and we deal with the notification to Building Control for you. Read the Building Regulations answer to see which jobs are caught. Our reach takes in Orpington, Dartford and Sidcup. Skylight installation in those towns follows the same plan: survey first, quote in writing, one team throughout.
- Free survey, with a look inside the loft and up on the extension roof.
- Written quote naming the glazing, kerb or flashing, lining and any council check.
- Fitting day, with one team and protected floors.
- Insulated lining closed to the ceiling.
- Notification where needed, and your guarantee in writing.
What Swanley householders want to know before a rooflight goes in
Does a Swanley house need council consent for a new roof window?
For a house the answer usually sits with permitted development, but a flat, a listed building or a restricted property is different. Sevenoaks District Council can confirm your address, and our planning guide gives the background.
Can you light a bungalow hallway without a big window?
Yes. A sun tunnel runs through the loft to the hall or bathroom and needs only a small opening in the roof.
We extended our Swanley family home and the middle of the kitchen is dark. What helps?
Glass in the extension roof does the work, because the old house still blocks the light from the front. A flat rooflight or a lantern on an insulated kerb brings daylight into the middle of the room. We check the roof build-up at the survey and put the glazing and kerb in the quote.
Can you replace the old dome on my roof?
Yes, and the new unit goes in with a fresh collar and lining, which is where much of the warmth comes from.
Who comes to survey a Swanley roof, and what does it cost?
The same team that fits the glass looks at the roof. The quote form or a WhatsApp message will get a Swanley survey on the calendar. The roof survey and the written quote come free of charge.
